The center back was omitted from the starting lineup for the World Cup 2014 qualifiers against Austria and Faroe Islands last week and played no part in either contest.

Low instead opted to pair Bayern Munich’s Jerome Boateng with Per Mertesacker at the back for both games, dropping the BVB man after his glaring error against Paraguay, which led to the South American’s third goal.

Low stated after both games that he was right to drop Hummels, but after Marcel Schmelzer received similar treatment from the Germany boss, Klopp is sure there is a hidden agenda.

“When there are mistakes pointed out, then it is not unlikely that it’s a Borussia Dortmund player who has made it,” the 46-year-old told reporters after his side’s 6-2 win over Hamburg. “I was a little surprised when it happened to Marcel Schmelzer and now it is happening to Mats. These things really have to be cleared up.

“The error is still hanging over him even today, as if Mats was the only one to screw up.”

Low was at pains to stress there is no favoritism in his selection policy however, making it clear that he admires the work of Klopp and the strength of the German contingent in the Die Schwarzgelben squad.

“There is no question that Dortmund have made excellent progress under Klopp,” Low told Sport Bild. “I have recently stressed again and again that Mats Hummels is a very good central defender who plays an important role in our plans.

“Against Paraguay, the defensive behavior of the entire team did not fit, I’ve addressed this. I’ve given preference to Jerome Boateng alongside Per Mertesacker, because I thought that he had earned it due to his consistently strong performances for Bayern in recent months.”